I started modding like 4days ago and now im trying to make my custom mob but im getting this error when trying to summon it and i have no idea what to do because i just followed a tutorial

 

java.lang.NullPointerException: null
	at net.minecraft.entity.ai.attributes.AttributeModifierManager.getAttributeValue(AttributeModifierManager.java:67) ~[forge-1.16.4-35.1.37_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading}
	at net.minecraft.entity.LivingEntity.getAttributeValue(LivingEntity.java:1849) ~[forge-1.16.4-35.1.37_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading}
	at net.minecraft.entity.LivingEntity.getMaxHealth(LivingEntity.java:1610) ~[forge-1.16.4-35.1.37_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading}
	at net.minecraft.entity.LivingEntity.<init>(LivingEntity.java:209) ~[forge-1.16.4-35.1.37_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading}
	at net.minecraft.entity.MobEntity.<init>(MobEntity.java:108) ~[forge-1.16.4-35.1.37_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B}
	at com.riisinkeitin.herkkumod.common.entity.ExampleEntity.<init>(ExampleEntity.java:18) ~[main/:?] {re:classloading}
	at net.minecraft.entity.EntityType.create(EntityType.java:448) ~[forge-1.16.4-35.1.37_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading}
	at net.minecraft.entity.EntityType.lambda$loadEntityUnchecked$1(EntityType.java:459) ~[forge-1.16.4-35.1.37_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading}
	at java.util.Optional.map(Optional.java:215) ~[?:1.8.0_302] {}
	at net.minecraft.entity.EntityType.loadEntityUnchecked(EntityType.java:458) ~[forge-1.16.4-35.1.37_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading}
	at net.minecraft.entity.EntityType.loadEntity(EntityType.java:516) ~[forge-1.16.4-35.1.37_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading}
	at net.minecraft.entity.EntityType.loadEntityAndExecute(EntityType.java:498) ~[forge-1.16.4-35.1.37_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading}
	at net.minecraft.command.impl.SummonCommand.summonEntity(SummonCommand.java:50) ~[forge-1.16.4-35.1.37_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading}
	at net.minecraft.command.impl.SummonCommand.lambda$register$1(SummonCommand.java:34) ~[forge-1.16.4-35.1.37_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading}
	at com.mojang.brigadier.CommandDispatcher.execute(CommandDispatcher.java:262) ~[brigadier-1.0.17.jar:?] {re:classloading}
	at net.minecraft.command.Commands.handleCommand(Commands.java:222) ~[forge:?] {re:classloading}
	at net.minecraft.network.play.ServerPlayNetHandler.handleSlashCommand(ServerPlayNetHandler.java:1162) ~[forge:?] {re:classloading}
	at net.minecraft.network.play.ServerPlayNetHandler.func_244548_c(ServerPlayNetHandler.java:1142) ~[forge:?] {re:classloading}
	at net.minecraft.network.play.ServerPlayNetHandler.processChatMessage(ServerPlayNetHandler.java:1121) ~[forge:?] {re:classloading}
	at net.minecraft.network.play.client.CChatMessagePacket.processPacket(CChatMessagePacket.java:40) ~[forge:?] {re:classloading}
	at net.minecraft.network.play.client.CChatMessagePacket.processPacket(CChatMessagePacket.java:8) ~[forge:?] {re:classloading}
	at net.minecraft.network.PacketThreadUtil.lambda$checkThreadAndEnqueue$0(PacketThreadUtil.java:19) ~[forge:?] {re:classloading}
	at net.minecraft.util.concurrent.TickDelayedTask.run(TickDelayedTask.java:20) ~[forge:?] {re:classloading}
	at net.minecraft.util.concurrent.ThreadTaskExecutor.run(ThreadTaskExecutor.java:139) ~[forge:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.util.concurrent.RecursiveEventLoop.run(RecursiveEventLoop.java:22) ~[forge:?] {re:classloading}
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:758) ~[forge:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:159) ~[forge:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.util.concurrent.ThreadTaskExecutor.driveOne(ThreadTaskExecutor.java:109) ~[forge:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.server.MinecraftServer.driveOneInternal(MinecraftServer.java:741) ~[forge:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.server.MinecraftServer.driveOne(MinecraftServer.java:735) ~[forge:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.util.concurrent.ThreadTaskExecutor.driveUntil(ThreadTaskExecutor.java:122) ~[forge:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.server.MinecraftServer.runScheduledTasks(MinecraftServer.java:721) ~[forge:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServer.java:667) ~[forge:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.server.MinecraftServer.lambda$startServer$0(MinecraftServer.java:233) ~[forge:?] {re:classloading,pl:accesstransformer:B}
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_302] {}

 

You mean this?

public static AttributeModifierMap.MutableAttribute setAttributes() {
		return MobEntity.func_233666_p_()
				.createMutableAttribute(Attributes.MAX_HEALTH, 10.0f)
				.createMutableAttribute(Attributes.ATTACK_DAMAGE, 0.8f)
				.createMutableAttribute(Attributes.ATTACK_SPEED, 5.0f)
				.createMutableAttribute(Attributes.MOVEMENT_SPEED, 2.5f)
				.createMutableAttribute(Attributes.ATTACK_KNOCKBACK, 0.5f);
	}

 

Ummm sorry don't know what u mean 😬 here is the full

package com.riisinkeitin.herkkumod.common.entity;

import net.minecraft.entity.EntityType;
import net.minecraft.entity.MobEntity;
import net.minecraft.entity.ai.attributes.AttributeModifierMap;
import net.minecraft.entity.ai.attributes.Attributes;
import net.minecraft.entity.ai.goal.LookAtGoal;
import net.minecraft.entity.ai.goal.LookRandomlyGoal;
import net.minecraft.entity.ai.goal.NearestAttackableTargetGoal;
import net.minecraft.entity.player.PlayerEntity;
import net.minecraft.util.SoundEvent;
import net.minecraft.util.SoundEvents;
import net.minecraft.world.World;

public class ExampleEntity extends MobEntity {

	public ExampleEntity(EntityType<? extends MobEntity> type, World worldIn) {
		super(type, worldIn);
	}

	public static AttributeModifierMap.MutableAttribute setAttributes() {
		return MobEntity.func_233666_p_()
				.createMutableAttribute(Attributes.MAX_HEALTH, 10.0f)
				.createMutableAttribute(Attributes.ATTACK_DAMAGE, 0.8f)
				.createMutableAttribute(Attributes.ATTACK_SPEED, 5.0f)
				.createMutableAttribute(Attributes.MOVEMENT_SPEED, 2.5f)
				.createMutableAttribute(Attributes.ATTACK_KNOCKBACK, 0.5f);
	}
	@Override
	protected void registerGoals() {
		super.registerGoals();
		
		this.goalSelector.addGoal(1, new LookRandomlyGoal(this));
		this.goalSelector.addGoal(2, new LookAtGoal(this, PlayerEntity.class, 15.0f));
		
		this.targetSelector.addGoal(1, new NearestAttackableTargetGoal<>(this, PlayerEntity.class, true));
	}
	
	@Override
	protected int getExperiencePoints(PlayerEntity player) {
		return 5;
	}
	
	@Override
	protected SoundEvent getDeathSound() {
		return SoundEvents.ENTITY_BEE_DEATH;
	}
	
	
	
}

 

 

Well i know i have been coding java for 4 days. Here is the only mention of that method 

@SuppressWarnings("deprecation")
    public void commonSetup(final FMLCommonSetupEvent event) {
    	
    	DeferredWorkQueue.runLater(() -> {
    		GlobalEntityTypeAttributes.put(EntityTypesInit.EXAMPLE.get(), ExampleEntity.setAttributes().create());
    	});

 

Dont know i was just following the tutorial video

 

Edited October 13, 20214 yr by jaasaa

Okay sorry